That study, entitled “Labile or stable: opposing consequences for memory when reactivated during waking and sleep”, has been carried out by Germans and Swiss investigators of Department of Neuroendocrinology, Lübeck, (Susanne Diekelmann), Department of Medical Psychology, Tübingen University, ( Jan Born), Department of Systems Neurosciences, University Medical Center Hamburg-Eppendorf, (Christian Büchel), and Division of Cognitive Neuroscience, University of Basel, (Björn Rasch).